<template>
  <header>
    {{ body }}
  </header>
</template>

<script>
export default {
    name:'MyBody',
    data: function () {
        return {
            body: 456
        }
    }
}
</script>

<style lang="less" scoped>
    header{
        background: green;
        height: 60px;
        line-height: 60px;
        flex: 1;
        border: 1px solid #000;
    }
</style>